Issue #15923 has been updated by alanwu (Alan Wu).


Instead of working on a separate buffer then asking Ruby to take ownership, you could make changes to the buffer of a string:

```c
VALUE new_string = rb_str_new("", 0);
rb_str_resize(new_string, size_you_want);
do_work(RSTRING_PTR(new_string), RSTRING_LEN(new_string));
```

Would this be good enough?

----------------------------------------
Feature #15923: New independent string without memcpy
https://bugs.ruby-lang.org/issues/15923#change-79241

* Author: puchuu (Andrew Aladjev)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
----------------------------------------
Hello. I've just tried to implement extension for ruby that will provide large binary strings.

I've inspected latest ruby source code and found 2 functions: _rb_str_new_ and _rb_str_new_static_ .

* _rb_str_new_ allocates new memory and uses _memcpy_ to copy from source string to new memory.
* _rb_str_new_static_ uses existing source string as it is, but adds _STR_NOFREE_ flag.

Is it possible to create independent string from source string without memcpy that will be freed automatically? Thank you.



-- 
https://bugs.ruby-lang.org/

Unsubscribe: <mailto:ruby-core-request / ruby-lang.org?subject=unsubscribe>
<http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>